ok now i know this has been discussed too many times before, and i have searched for it all (i think) but i need some specific help. I have a 95 contour gl zetec with the no tach cluster and want to put in a 95 V6 cluster with tach because i cant find one from a 4cyl. I've read that this is possible, just that the tach will not read correctly. oh and yes i have the damn electronic speedo. now i installed everything but the tach doesnt even move. everything else works fine; gas, temps, blinkers, high beams and all the indicators. How can i fix this? something about switching the resistors? or do i have to run a tach wire? any help is greatly appreciated.